Lenovo ThinkPad X220 Hardware Maintenance Manual page 87

When installing:
Route the speaker cables along the cable guides as shown in the following figure.
Removal steps of base cover assembly
Step Screw (quantity)
1
M2 × 3 mm, wafer-head, nylon-coated (5)
2
HEX nut washer&nylok #4R (2)
Color Torque
Black 0.181 Nm
(1.85 kgfcm)
Silver 0.392 Nm
(4 kgfcm)
.
Chapter 8 Removing and replacing a FRU
81